But some analysts say the same rhetoric that has resonated abroad is running into a more secular, less polarised electorate at home.
Given current tight polling and New Zealand's proportional representation voting system, Prime Minister Chris Luxon's National party will need the seats of New Zealand First and the right-wing ACT party for a chance to form government again and keep the country on its conservative track.
"This time it's almost now or never in terms of getting far greater power to implement our alternative to how to run an economy," the 81-year-old Peters told Reuters, arguing voters had previously given New Zealand First only limited power.
"We are expressing how they think. That's why they're turning up."
Grant Welman, who runs a handyman business, said the crowd at a Peters event in Tauranga was made up of "everyday Kiwis" with "a deep concern for the direction of the country."
The father of two said he worries about immigration outpacing infrastructure and dislikes identity politics, though he is not wholly convinced by Peters himself.
"I am voting New Zealand First this election, not because I believe they're the greatest, but I do believe that they are the best choice available."
Founded in 1993, New Zealand First has long combined social conservatism on issues such as immigration and Indigenous rights, with an interventionist economic programme that includes stronger state support for the elderly and regional development.
Peters has played a pivotal role in coalition-building, helping form four of the past 10 governments and serving as foreign minister in three. This time around, he has ruled out a coalition with the centre-left Labour Party.
But Peters faces a new challenger to his role as kingmaker with the emergence of the centrist Opportunity party, which could hold the balance of power after the election. It supports immigration, policies on LGBT rights and enhanced environmental protections.
Peters - who rejects the populist label, saying all politicians want to be popular - has framed his attacks on "woke" politics as a defence of common sense, experience and national sovereignty.
New Zealand First has sponsored a bill to define "woman" and "man" in law, has proposed immigration curbs and advocates leaving the Paris climate accord.
"The 2026 campaign is the most explicitly right-wing pitch NZ First has made in its 33-year history," said Josh Van Veen, a politics academic and former New Zealand First staffer.
"This might well be inspired by a global populist movement, but the polling would suggest it doesn't have quite the same appeal it does elsewhere in the Anglosphere."
New Zealand First won 6.1 per cent of the vote in 2023 and rose as high as 13.6 per cent in an April poll. But recent surveys suggest that momentum has faded, putting the party's support around 10 per cent.
